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The uncertainty of fossil fuel reserves, volatility of oil prices, and increasing release of carbon dioxide and other pollutants into the environment have led to a growing interest in the production of fuel ethanol. Research on bioethanol production has focused on all phases of the process, from raw materials to by-product recovery, and is directed toward improving the efficiency of fermentation and reducing the cost of ethanol production. However, there is still great scope for developing an efficient and inexpensive production process for bioethanol. This article describes a production process for bioethanol using wheat as a feedstock. This process was developed following analysis of mashing parameters such as wheat inclusion rate, pH, temperature, and exogenous enzyme choice. Further work showed that cooking the wheat was not required and that the process of backsetting (replacement of some of the water in the earlier stages in the process of distillation with spent wash or vinasse) benefited fermentation. These results have allowed the development of a proposed low-cost production process (at laboratory-scale) that could be of use in Northern Europe.
机译:化石燃料储量的不确定性,油价的波动以及二氧化碳和其他污染物向环境中的释放不断增加,导致人们对燃料乙醇的生产越来越感兴趣。生物乙醇生产的研究集中于该过程的所有阶段,从原材料到副产物的回收,并致力于提高发酵效率和降低乙醇生产成本。但是,开发生物乙醇的有效且廉价的生产方法仍有很大的空间。本文介绍了以小麦为原料的生物乙醇生产工艺。通过分析糖化参数(例如小麦的掺入率,pH,温度和外源酶的选择)来开发此过程。进一步的工作表明不需要煮小麦,并且倒置过程(在用废洗液或酒糟蒸馏的早期阶段用蒸馏水代替一些水)对发酵有益。这些结果使拟议的低成本生产工艺(实验室规模)得以开发,该工艺可以在北欧使用。

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